Jonas Brothers Promise Surprises on Grammy Night

First-time Grammy nominees the Jonas Brothers say they are each a bundle of nerves about Sunday's big show – but are concentrating on singing, not winning.

"I'm beyond nervous. I'm not even going to hide it at all," Kevin Jonas, 21 tells PEOPLE. "We're going to focus on the performance. That's what we do best and that's what we'll put our minds on."

The brothers, who are nominated for best new artist, spoke to PEOPLE during a break from filming their upcoming Disney Channel series, JONAS. They are slated to perform during the Grammy primetime telecast – but are keeping mum about what they'll be singing.

Says 16-year-old Nick Jonas: "I can't give away any secrets but there will be some big surprises."

Going out on a limb, Nick says that while "we would love to win, at the end of the day I think Adele is really amazing. I'd give her record, Chasing Pavements, record of the year."

Adds Nick: "The thing to say is even if we don't win, it's just an honor to be nominated. Of course that's how we feel."

Joe, 19, echoes that sentiment saying, "Just to be in that room, performing on that stage is amazing."